Chen Xiao accidentally travels back to ancient times, only to find himself starting out as a helpless nobody caught in the chaos of war. However, he obtains an Infinite Steamed Bun System. Using the system, he begins providing relief to disaster-stricken refugees, recruits the mighty general Li Cunyi, and rescues the female general Wei Hongying. With the overwhelming advantage of modern technology, he defeats powerful enemies one after another and gradually brings the White Tiger Hall under his control, eventually taking command of the entire Shangyang City. Amid the chaos of war, he earns the fearsome reputation of the Heavenly General, becoming renowned throughout the land.